<template>
   <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
        <div>
            <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出~</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse?'64px':'200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <!-- 侧边栏菜单区域 -->
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
                <!-- 一级菜单 -->
                <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                    <!-- 模板区域 -->
                    <template slot="title">
                        <!-- 图标 -->
                      <i :class="iconsObj[item.id]"></i>
                        <!-- 文本 -->
                      <span>{{item.authName}}</span>
                    </template>
                    <!-- 二级菜单 -->
                    <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                        <template slot="title">
                        <!-- 图标 -->
                      <i class="el-icon-menu"></i>
                        <!-- 文本 -->
                      <span>{{subItem.authName}}</span>
                    </template>
                    </el-menu-item>
                </el-submenu>
            </el-menu>
        </el-aside>
        <!-- 右侧内容主体 -->
        <el-main>
            <!-- 路由占位符 -->
            <router-view></router-view>
        </el-main>
    </el-container>
</el-container>
</template>

<script>
export default {
    data(){
        return{
            //左侧菜单数据
            menulist:[],
            iconsObj: {
                '125':'iconfont icon-users',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao',
            },
            //是否折叠
            isCollapse :false,
            //被激活的连接地址
            activePath:''
        }
    },
    //生命周期函数
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout(){
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        //获取所有菜单
        async getMenuList(){
            const {data: res} =await  this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message .error(res.meta.msg)
            this.menulist = res.data
            console.log(res)
        },
        //点击按钮，切换菜单折叠与展开
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        //保存连接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
        }
    }
}
</script>

<style lang="less" scoped>
    .el-header {
        background-color: #333d46;
        display:flex;
        justify-content: space-between;
        padding-left: 55px;
        align-items: center;
        color: #fff;
        font-size: 20px;
    }

    .el-aside {
        background-color: #333744;
        .el-menu {
            border-right: none;
        }
    }

    .el-main {
        background-color: #EAEDF1;
    }

    .home-container {
        height: 100%;
    }

    .iconfont {
        margin-right: 10px;
    }

    .toggle-button{
        background-color: #4A5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>